dineth lochana

I've been trying to compile the ONscripter source code with the "Widescreen" option. According to uncle Mion you're supposed to do it by defining "RCA_SCALE" before compiling. I defined it but when I try to build it it sprout's a error saying that the dependencies can't be found. I been trying to do this the last three hour's or so and i'm now on the verge of giving up. Can anyone help me?